Final answer:
The flute is the only woodwind instrument typically found in an orchestra among the options provided. Saxophones are less common and trombones are categorized as brass instruments, not woodwind. The French horn, also a brass instrument, is common in orchestras.
Step-by-step explanation:
The woodwind instruments that are usually found in an orchestra include the flute. Instruments like the saxophone and trombone are less common in a classical orchestra setup. The trombone, specifically, is a brass instrument, not a woodwind. The French horn, while also found in orchestras, similarly belongs to the brass family.Woodwind instruments feature various mechanisms, such as finger holes and keys, to change the length of the air column and modify the pitch. For example, the flute operates as an open-pipe resonator, where players open and close holes to change the note. Professional orchestras typically incorporate such instruments for their versatility and range of sounds. Meanwhile, brass instruments like the French horn use valves to alter tube lengths and produce their characteristic sounds.